\begin{tikzpicture}
    \tkzDefPoints{0/0/O, 2.5/2/A, 3/0/B,  2.3/1.0/P}

    \tkzDrawSegments(O,A  O,B)
    \tkzDrawPoint[fill=black](P)
    \tkzLabelPoints[left](O)
    \tkzLabelPoints[right](A,B,P)
\end{tikzpicture}

